Reading characters/strings with arduino serial port

Finally, I can send and receive messages between the ardbot and my pc, over bluetooth. This post on the Arduino forum was very helpful:

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1231650517

Here's my code in its preliminary state. The idea will be to transmit a short string of characters from the pc to the ardbot. The '!' character represents the start of a message. The code fragment below just echoes back to the PC terminal program what was sent.

void loop() {
  bluetooth.flush();
  char input[10];
  memset(input, '\0', 10);
  byte inByte = '\0';
  while(inByte != '!') {
    inByte = bluetooth.read(); // Wait for the start of the message
  }
  if(inByte == '!') {
    while(bluetooth.available() < 5) { // Wait until we receive 5 characters
      ;
    }
    for (int i=0; i < 5; i++) {
      input[i] = bluetooth.read(); // Read the characters into an array
    }
  }
  bluetooth.print("Received: "); // Send the message back to the pc terminal
  bluetooth.println(input);
}